Hinged pressure roller and paper guide for duplicator carriages



A. MARCHEV May 12, 1936.

HINGED PRESSURE ROLLER AND PAPER GUIDE FZOR DUPLICATOR CARRIAGES 2 Shees-Sheet 1 Filed May ll, 1934 A. VMARCHEV HINGED PRESSURE ROLLER AND PAPER GUIDE FOR DUPLICATOR CARRIAGES Filed May 11, 1954 2 Sheets-Sheet 2 Patented May 12, 1936 UNITED STATES PATENT OFFICE Alfred Marchev, La Grange, Ill., assignor to Ditto, Incorporated, Chicago, 111., a corporation of West Virginia Application May 11, 1934, Serial No. 725,035

12 Claims.

This invention relates to duplicating machines and more especially to those of the hectograph type.

The invention may be embodied for example in a machine similar to the one disclosed in the copending application of Marchev and Hernlund, Serial No. 663,404, filed March 29, 1933.

In machines of this type, there is provided a platen with a gelatin or hectograph band supported thereon and a movable carriage above the same provided with a platen roller and a pressure. roller cooperating to feed sheets of paper onto the surface of the gelatin band. The platen roller is supported on a yoke which is rocked to move the roller upwardly and downwardly. When they roller is moved downwardly, it engages the paper and cooperating with the pressure roller forces one edge of the paper into contact with the duplicating surface of the gelatin band. The carriage is then moved to roll the platen roller over the entire surface of the sheet of paper in the duplicating process.

It is desirable in these machines to have ready access to the pressure roller and platen roller for such purposes as cleaning, inspecting, and the like. The paper guide plate or support lies over the pressure roller so that it has heretofore been difficult to get at the rollers.

It is a purpose of this invention to provide in a machine of this character a paper guide or support that is movable out of the way in order that the operator can have ready access to the pressure roller.

It is also a purpose of this invention to movably mount the pressure roller and paper guide together so that they may be moved out of the normal operating position and out of the carriage frame.

A further purpose of this invention is to provide a carriage having the pressure roller and paper guide pivotally mounted on the carriage to swing up out of operating position to give access to the pressure and platen rollers.

Other objects and advantages will appear as the description progresses in connection with the accompanying drawings in which- Fig. 1 is a plan view of the carriage showing it mounted on the frame of the machine over the platen;

Fig. 2 is an elevation partly in section of a carriage showing it in position-on the machine;

Fig. 3 is a section substantially on the line 3-3 of Fig. 1; I

Fig. 4 is a section on the same line with the paper guide and pressure roller in raised position;

Fig. 5 is a section on the line 5-5 of Fig. 3;

Fig. 6 is an enlarged detail taken at one side of the paper guide looking upward at the lower surface thereof.

Referring to the drawings wherein a preferred embodiment of the invention is illustrated, A designates a portion of the frame of the duplicating machine, B designates a flat platen mounted on the frame A, and C designates the carriage which is slidable lengthwise of the frame A and which is adapted to apply a sheet of paper to the gelatin band D which extends over the platen B.

The carriage has mounted therein the platen roller III which is pivotally supported by means of platen arms I I, there being one of these arms at each side of the carriage, and these arms are in turn fixed upon the shaft I2 which is journalled in suitable bearings in the carriage frame. The operating handle or arm I3 is also fixed to shaft I2 for raising and lowering the platen roller, and suitable springs I4 are secured to the. carriage frame and the platen arms to normally urge the platen roller into raised position.

The paper guide or support is indicated at I5. This support is carried on a pair of arms I6 and I! which arms are in turn pivoted by means of the pins such as I8 to the carriage frame. The paper guide is bolted to the arms by means of an inturned portion I8 on the arm and the bolt I9. Each of the arms also has an extension indicated by the numeral 20 (see Figs. 3 to 6) which is formed to fit snugly down on the carriage frame as indicated at 2| in Fig. 3, and the carriage frame has the upstanding lugs 24, one at each side apertured to receive the locking pins 25 on the extensions 20.

These locking pins, it will be evident from an inspection of Fig. 5, are merely spring pressed by means of the spring so asto normally extend into the opening 21 in the extension 24 so that theoperator by pulling out on the pins 25 may release the paper support or guide and lift it up from the normal operating position shown in Fig. 3 to the position shown in Fig. 4. This puts the paper guide up out of the way and permits ready access to the pressure roller 28 and to the platen roller I 0 as well as to the other 7 parts in the carriage.

The pressure roller 28 is also supported on the arms I6 and I I for a limited pivotal movement as will now be explained. Each of the arms I6 and IT has pivoted thereon an arm 29, and the shaft of the pressure roller is journalled in the arms 29. These arms 29 have the openings 30 which extend into the openings 30. Thus the arms 29 may swing a limited amount by their pivots to permit adjustment of the pressure rollor in its cooperation with the platen roller.

In order to' apply pressure between the rollers,

-I utilize springs 32. Each spring 32 has one end connected to pin 33 on its arm 29, and the other end is connected to stud 34 which is mounted on the inturned' extension [8' found on each of the arms l6 and IT. The springs 32 being under 7' tension, urge the pressure roller toward theplaten roller as shown in Fig. 3.

In the normal operating position, the pressure roller 28 and the paper guide l5 are in the position shown in Fig. 3, and are held locked in this position by means of the pin 25 fitting in the openings 2! on the carriage frame extensions 24. The platen roller may be elevated and lowered in the usual fashion. The rubber stop 35 on the platen arm is adapted to engage "a shoulder 36 on the carriage frame to limit-the upward movement of the platen roller. Now,.however, when it is desired to get at the pressure roller 23 and platen roller ID for other purposes, the pins 25 are pulled out, and arms I6 and H and with them the paper guide I 5 and pressure roller 23 are lifted up into the position shown in Fig. 4.

It will be evident from this figure that the pressure roller is'in position to be readily cleaned without any difiiculty. Furthermore, the springs 32 are accessible, and the platen roller 10 i's-als'o readily accessible for cleaning.

7 in operating position, the arms l6'and I! are swung back to the position shown in Fig. '3. To do this, it is not necessary to pull out the pins .25 since their inner ends are rounded and since has been shown and described, it is to be understood that itis capable of many modifications.

Changes, therefore, in the construction and a'rrangement may be made without departing from the spirit and scope of the invention as disclosed in th appended claims in which it is intended to claim all novelty inherent in the inventionais broadly as possible in view of the priorar t.

Having thus described the invention, what --I claim as new and desire to secure by Letters Patent is: V

1. A carriage for duplicating machines having, mounted thereon a platen roller, a pressure roller, and a paper guide, the paper guide being stationary on said carriage in normal operating position and being movable out of normal operating position to provide for ready access to said rollers.

2. A carriage for duplicating machines having a paper guide pivotally mounted thereon for on said carriage for movement between operating position within the carriage and cleaning position outside the carriage.

4. In a carriage for duplicating machines, a pressure roller, and means mounting said roller on said carriage for movement between operat ing position within the carriage and cleaning position outside the carriage, and a paper guide carried by said mounting, means.

'5. A carriage for duplicating machines having a platen roller, a pressure roller, and a paper guide, said pressure roller and paper guide being pivotally mounted in said carriage and movable out of said carriage about its pivotal mounting, and means on said carriage for holding said paper guide stationary with respect to the carriage.

6. A carriage for duplicating machines having.

a platen roller, a .pressure roller, and a paper guide, the paper guide being movable out of normal operating position to a position outside of the carriage to provide for ready access to said rollers, and means to hold said guide in normal operating position. 7

7-. A carriage for duplicating machines having a platen roller, a pressure roller, and a paper guide, a pair of arms pivoted on the carriage and fixed to said guide for pivotally mounting the guide, the arms havin'gmeans thereon for supporting-said pressure roller. 7 V

9. A carriage for duplicating machines having a platen roller, a pressure roller, and a paper guide, a pair of arms supporting said paper guide with the lower end thereof normally extending into the carriage above the pressure roller, said arms being movably mounted to said carriage to move said guide out of the carriage and thereby render the interior of the carriage more accessib'le. 10. A carriage for duplicating machines having a platen rolle r, a pressure roller, and a ,paper guide, means providing a supporting framework for said pressure roller and paper guide, said means being pivotedto said carriage about an axis spaced from the paper guide whereby movement of sa'id means about its 'axiswill move the paper guide and pressure roller clear of the carriage, and'loo'k means for locking the paper guide and pressure roller in functionally operative position within the carriage.

11. A carriage ator duplicating machines comprising a carriage, a platen roller mounted therein, a paper guide mounted in said carriage in position to direct sheets toward said platen roller, and mounting means for said guide movablewith respect to-said carriage to elevate said guide above the carriage.

12. A carriage for duplicating machines comprising a'carriage, a platen roller mounted 'therein, apap'e'r guide mounted in said carriage in position to direct sheets'toward said jplaten roller, mounting means :for said guide movable with respect to said carriage to elevate said guide above the carriage, and a pressure roller carriedby "s'aidm'o'uriting means. 

